The HD 4203 system contains 2 exoplanets. It is located 265.42 light years away from the solar system.
| Mass | 1.25 solar masses |
| Radius | 1.42 solar radiae |
| Temperature | 5596 kelvin |
| Stellar Metallicity | 0.4 decimal exponent |
| Age | 8.52 billion years |
At more than 50 Earth masses, HD 4203 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 708.761 Earth masses |
| Density | 1.660 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 1.17 AU |
| Eccentricity | 0.52 |
| Orbital Period | 431.880 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2002-03 |
| Reference | Vogt et al. 2002 |
At more than 50 Earth masses, HD 4203 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 689.660 Earth masses |
| Density | 1.610 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 6.95 AU |
| Eccentricity | 0.24 |
| Orbital Period | 6700.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2014-04 |
| Reference | Kane et al. 2014 |